Stan Wawrinka pulls out of U.S. Open with knee injury.
Defending champion Stan Wawrinka pulled out of the U.S. Open because of an injured knee. He will have a medical procedure and sit out the rest of 2017.
“This was the only solution to make sure I will be able to compete at the top level for many more years,” Wawrinka said Friday in a statement through his agency. He joins the man he beat in last year’s final at Flushing Meadows, Novak Djokovic, in calling it quits for this season because of injury. The fourth-ranked Wawrinka added last year’s title to his 2014 Australian Open and 2015 French Open championships. He got back to the finals in Paris in June, losing to Rafael Nadal, but was eliminated by Daniil Medvedev in the first round at Wimbledon. The 32-year old Swiss was clearly bothered by his left knee then, icing it during changeovers. He said after the defeat the knee had been a problem on and off all season and he needed to figure out what was wrong. He finishes with just one title this season.